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Owner's Manual 17
Channel Controls
The vertical channel strips look very similar, and have
only a few differences between them. Each
channel works independently, and just controls the
signals plugged into the inputs directly above it.
Here are a few features and differences:
Mono Channels 1 and 2
• These are mono channels, and their controls
affect either the mono mic input or the mono
line-level input.
• Each channel has a hi-z switch, so you can
connect guitars directly without the need for a
DI box.
• High pass fi lter affects both the mic and line
inputs.
• Gain control adjusts the mic level and line
level.
• The 3-band EQ has shelving high, shelving
low, and peaking mid EQ with adjustable mid
frequency.
Hybrid Channels 3/4
• These hybrid channels have a mono mic input
and stereo line-level inputs. The mono mic
signal is sent in equal amounts to the left and
right sides of the stereo channel.
• High pass fi lter affects the mic input only.
• Line inputs are switchable +4 dB /–10 dB.
• Gain control adjusts the mic level only.
• The 4-band EQ has shelving high, shelving low,
with peaking lo-mid and peaking hi-mid.
Stereo Channels 5-8
• These stereo channels have two line-level
inputs.
• Gain control adjusts the line level only.
• The 3-band EQ has shelving high, shelving low,
and peaking mid EQ.
• Channel 7 and 8 have a switch to select
FireWire inputs instead of the analog line
inputs.
“U” like Unity gain
Mackie mixers have a “U” symbol on almost every level
control. It stands for “unity gain,” meaning no change in
signal level. The labels on the controls are measured in
decibels (dB), so you’ll know what you’re doing
level-wise if you choose to change a control’s settings.
MUTE
SOLO
48V
MUTE
SOLO
48V
MUTE
SOLO
48V
LINE
MUTE
SOLO
MUTE
SOLO
PAN
2
1
MID
FREQ
MID
FREQ
BAL/UNBAL BAL/UNBAL
ALT 3-4 ALT 3-4 ALT 3-4 ALT 3-4 ALT 3-4
LOW
MID
400Hz
O
N
Y
X
M
I
C
P
R
E
HIGH
12kHz
LOW
80Hz
EQ
INSERT INSERT
O
N
Y
X
M
I
C
P
R
E
HIGH
12kHz
LOW
80Hz
EQ
O
N
Y
X
M
I
C
P
R
E
HIGH
12kHz
HIGH
MID
2.5KHz
LOW
80Hz
EQ EQ
(MONO)
L
R
L
(MONO)
R
BAL/UNBAL
L
(MONO)
R
BAL/UNBAL
L
(MONO)
R
BAL/UNBAL
AUX RET
U
1
1
2
AUX SEND
MID
2.5kHz
LOW
80Hz
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
U
+15-15
HIGH
12kHz
MID
2.5kHz
LOW
80Hz
HIGH
12kHz
FW 1-2
LINE
HI
-
Z
LINE
-10dB
+
4dB
HI
-
Z
LINE
PRE
POST
PRE
POST
PRE
POST
PRE
POST
LEVELLEVELLEVEL LEVEL LEVEL
+10dB
OO
U
+10dB
OO
U
+10dB
OO
U
+10dB
OO
U
+10dB
OO
U
1 2 3-4
LINE IN 5-6 LINE IN 7-8
AUX
PAN
2
1
AUX
PAN
2
1
AUX
PAN
2
1
AUX
PAN
2
1
AUX
OL
- 20
OL
-
20
-
20
OLOL
-
20
OL
-
20
12
BAL/UNBAL BAL/UNBA
L
SEND SEND SEND SEND
SEND INPUT
3-4 5-6 7-8
GAIN
+20dB-20dB
U
GAIN
MIC
GAIN
GAIN
+20dB-20dB
U
U
20
30
40
60
+40dB
U
-20dB
U
20
30
40
60
GAIN
+40dB
U
-20dB
U
20
30
40
60
1
LINE
2
LINE
1k
100 8k
1k
100 8k
MAX
OO
MAX
OO
MAX
OO
MAX
OO
MAX
OO
MAX
OO
MAX
OO
MAX
OO
MAX
OO
MAX
OO
LR LR LR LR LR